<?php

/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Log
 * @subpackage Filter
 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: Message.php 20981 2010-02-08 15:51:02Z matthew $
 */
/**
 * Zend_Log_Filter_Abstract
 */
// require_once 'Zend/Log/Filter/Abstract.php';
/**
 *
 * @category Zend
 * @package Zend_Log
 * @subpackage Filter
 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: Message.php 20981 2010-02-08 15:51:02Z matthew $
 */
class Zend_Log_Filter_Message extends Zend_Log_Filter_Abstract {

    /**
     *
     * @var string
     */
    protected $_regexp;

    /**
     * Filter out any log messages not matching $regexp.
     * @param string $regexp Regular expression to test the log message
     * @throws Zend_Log_Exception
     */
    public function __construct ($regexp) {
        if (@preg_match ($regexp, '') === false) {
            // require_once 'Zend/Log/Exception.php';
            throw new Zend_Log_Exception ("Invalid regular expression '$regexp'");
        }
        $this -> _regexp = $regexp;
    }

    /**
     * Create a new instance of Zend_Log_Filter_Message
     * @param array|Zend_Config $config
     * @return Zend_Log_Filter_Message
     * @throws Zend_Log_Exception
     */
    static public function factory ($config) {
        $config = self::_parseConfig ($config);
        $config = array_merge (array('regexp' => null), $config);
        return new self ($config['regexp']);
    }

    /**
     * Returns TRUE to accept the message, FALSE to block it.
     * @param array $event event data
     * @return boolean accepted?
     */
    public function accept ($event) {
        return preg_match ($this -> _regexp, $event['message']) > 0;
    }

}
